CN102971096B - Stretch-bending straightener - Google Patents
Stretch-bending straightener Download PDFInfo
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- CN102971096B CN102971096B CN201180030624.2A CN201180030624A CN102971096B CN 102971096 B CN102971096 B CN 102971096B CN 201180030624 A CN201180030624 A CN 201180030624A CN 102971096 B CN102971096 B CN 102971096B
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- Prior art keywords
- smoothing roll
- slewing rollers
- band
- equipment
- roll
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D1/00—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling
- B21D1/05—Stretching combined with rolling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D1/00—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling
- B21D1/02—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling by rollers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D41/00—Application of procedures in order to alter the diameter of tube ends
- B21D41/02—Enlarging
- B21D41/026—Enlarging by means of mandrels
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D41/00—Application of procedures in order to alter the diameter of tube ends
- B21D41/02—Enlarging
- B21D41/026—Enlarging by means of mandrels
- B21D41/028—Enlarging by means of mandrels expandable mandrels
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Straightening Metal Sheet-Like Bodies (AREA)
- Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
- Moulding By Coating Moulds (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
The invention relates to a method and stretch-bending straightener for straightening metal strips (1) by stretch-bending, comprising a plurality of straightening rolls (5a, 6a, 7a, 8a) which are arranged behind one another in the strip flow direction (D) and spaced from one another in the strip flow direction (D), wherein the strip (1) subject to tensile stress below the limit of elasticity is alternately bent around the straightening rolls (5a, 6a, 7a, 8a), undergoing plastic elongation, wherein a deflecting roll (5b, 6b, 7b) is arranged upstream of one or more straightening rolls (5a, 6a, 7a), respectively, wherein said straightening rolls can be adjusted relative to the strip (1) and wherein said deflecting roll has a larger diameter than the respective downstream straightening roll. Said method and said system are characterized in that, in order to vary the immersion depth, the straightening rolls (5a, 6a, 7a) can be adjusted relative to the associated deflecting roll (5b, 6b, 7a) such that the free strip length (F) between the run-off point (9) of the strip (1) from the deflecting roll to the run-on point (10) of the strip (1) onto the associated straightening roll does not exceed a predefined maximum value, above which longitudinal undulations of the strip form. The system is preferably designed such that, as the immersion depth and/or the angle of contact are varied, the free strip length never exceeds the maximum value over the entire adjusting range.
Description
Technical field
The present invention relates to a kind of method and apparatus for stretch-bend leveller sheet metal strip, its have multiple set gradually on (level or substantially horizontal) band direct of travel and the smoothing roll separated on band direct of travel, be in and be less than band in the tension of elastic limit around smoothing roll by alternating bending and at this moment by plastic elongation, before one or more smoothing roll that can be conditioned relative to band, arrange slewing rollers respectively, described slewing rollers have larger diameter than corresponding rearmounted smoothing roll.
Background technology
When carrying out stretch-bend leveller in this stretch-bend leveller equipment or this stretching-bending straightener frame, band to be usually in the tension being less than elastic limit or yield limit and band around smoothing roll within the scope of plastic range or elastic-plastic by alternating bending.The smoothing roll of described plasticity or elastic-plastic effect is also referred to as draw roll.Band (generally) is called as degree of drawing by plastic elongation and the degree that is therefore elongated.
By the sheet metal strip of injustice aligning and therefore unevenness can be eliminated by this stretch-bend leveller equipment.Unevenness such as refers to that band percent ripple and/or band are drawn a bow, they based on web fibers in web planarity difference in length and produce.But unevenness also can refer to that band band in longitudinal and/or transverse direction bends, described band bends and is caused by the moment of flexure in band, and described moment of flexure is such as bent around slewing rollers by band elastic-plastic and produces or produce because of elastic-plastic distortion when band is wound.Buckling is otherwise known as vertical curved, transverse curvature horizontal curved be called as horizontal curved.During stretch-bend leveller, uneven band is being less than the elastic limit R of strip material
eor technology elastic limit R
p0.01tension under bent around the enough little roller of diameter by (alternation), produce elasticity/plastic deformation by tension and bending being superimposed upon in band thus.Band is elongated by plasticity, and the degree that this plasticity is elongated is called as degree of drawing.In plasticity is elongated, short web fibers is elongated relatively tempestuously originally.In the ideal case, after aligning, all strips fiber has identical length, therefore should produce in principle do not have percent ripple or band to draw a bow by the band aligned ideally.In practice always not like this, little remaining unevenness (such as ripple or edge waviness) can therefore be left in band.In addition, in band, cause remaining moment of flexure by alternating bending, this remaining moment of flexure can cause after aligning in longitudinal (vertical curved) or horizontal (horizontal curved) undesirable plasticity residual bend of upper appearance.By can substantially eliminate remaining moment of flexure by compatibly harmonious for the bending strength on each roller.Propose for this reason, regulate the geometry of stretching-bending straightener frame in a variety of different ways, to realize leveling effect as well as possible.
In addition by practice in known in principle, before smoothing roll, between and/or slewing rollers are set afterwards, described slewing rollers have larger diameter more obvious than smoothing roll and usually only have elastic reaction.
Such as by EP 0298852B1(or DE 3885019T2) a kind of device for aligning sheet metal strip is disclosed, wherein, multiple stretch-bend leveller roller is set between import pinch roll group and outlet pinch roll group.Slewing rollers can be set on the diverse location of equipment, described slewing rollers be mainly used in making band its by during equipment through specific stroke.
Similarly, professional article " Benefits of a new leveller technology forpackaging steels:Multi-Roller Tension Leveller " (EmmanuelDechassey, iron and steel research institute of Irsid(France), An Saile group, METEC meeting (international metallurgical technology exhibition and academic conference), in June, 2003) introduce a kind of stretch-bend leveller device with four smoothing rolls.In the overlap of this adjustable first resistance straightening unit (the first and second smoothing rolls) and the overlap of the second resistance straightening unit (the 3rd and the 3rd smoothing roll).Be integrated with again the larger slewing rollers of multiple diameter in the device.
Stretch-bend leveller equipment known in practice---is wherein also provided with the slewing rollers of elastic reaction if desired---and has been proved to be effective in principle, but they are further improved.
Summary of the invention
Therefore technical problem of the present invention is, provides a kind of and starts the stretch-bend leveller method of carried type and a kind of stretch-bend leveller equipment starting put forward type, can especially reliably and effectively eliminate unevenness by the method or this equipment.
In order to solve this task, in beginning carry in the congenic method for stretch-bend leveller sheet metal strip of type and proposing: in order to change sinkage, described smoothing roll regulates relative to the slewing rollers matched, making the free belt length left the point of arrival a little arriving smoothing roll to band left from slewing rollers at band be no more than the maximum of regulation, the longitudinal ripple degree of band can be produced when exceeding this maximum.
In order to change sinkage, particularly preferably described smoothing roll regulates relative to slewing rollers, make free belt length be no more than (maximum) strip width 8%, preferably more than (maximum) strip width 4% maximum.When considering common strip width, advantageously, free belt length is no more than the maximum of 150mm, preferably 100mm, particularly preferably 70mm.
In this present invention first from such understanding, in traditional stretching-bending straightener frame, in the first equipment section with multiple smoothing roll, mainly produce degree of drawing, and mainly eliminate remaining moment of flexure in the second equipment section with other smoothing roll.In addition the present invention is also based on the recognition: at least in the first equipment section of smoothing roll with main generation degree of drawing, be suitably smoothing roll configuration slewing rollers.Show according to the practical studies of FInite Element (FEM) and theory calculate, relevant with the geometrical arrangements of smoothing roll to each other and between smoothing roll and slewing rollers with the quantity of smoothing roll for the leveling effect of given band.At band direct of travel, the larger distance between smoothing roll can reduce or eliminate remaining percent ripple completely.This makes people make every effort in practice arrange distance large as far as possible between each smoothing roll.But the large distance between each smoothing roll can cause the band of advancing to tend to produce (flexible) longitudinal ripple degree in practice.This longitudinal ripple degree is also referred to as " towel effect " (Handtucheffekt).This effect especially appears in thin strip, and it is in high tension in larger distance.When this band in longitudinal ripple shape is by smoothing roll, this longitudinal ripple degree, by plasticity press-in band, therefore adversely have impact on leveling effect.This effect mainly appears at also elongates remarkable plasticity on the smoothing roll of band.To smoothing roll later---the residual bend of substantially only carrying out local plastic by it corrects, and this flexible longitudinal ripple degree is also unimportant or only produce minor effect.
Now by measure according to the present invention can carry out work when the spacing of smoothing roll is relatively large and does not occur the problems referred to above, because first eliminate flexible longitudinal ripple degree by band was first directed through slewing rollers before smoothing roll according to the present invention.Band leave slewing rollers leave a little after, band arrives on the smoothing roll that is positioned at after slewing rollers after certain free belt length.Present test gives unexpected result: when the free belt length left a little between the point of arrival the smoothing roll of band below left from slewing rollers at band is minimized, especially reliably can avoid longitudinal ripple degree before smoothing roll.Therefore can arrange favourable longer distance between smoothing roll in category of the present invention, this distance can reduce or eliminate remaining percent ripple completely, and there will not be the problem of the remaining percent ripple of the elasticity of expection.
Usual needs process thickness, the width band different with limit of stretch in stretch-bend leveller equipment.Requirement can change the bending strength of each smoothing roll for this reason.Change sinkage or the band looping angle around smoothing roll for this reason.During this change, preferred smoothing roll is regulated like this when different sinkage or looping angle, and namely free belt length is no more than maximum in whole adjustable range.Therefore stretch-bend leveller equipment is so designed, and makes to avoid occurring longitudinal ripple degree in whole adjustable range.This traditional perpendicular to or the smoothing roll that is approximately perpendicular to band direct of travel regulate in realize like this, namely smoothing roll is so little to the distance of slewing rollers, so that free belt length is less than maximum all the time or is no more than maximum in whole adjustable range.Therefore can desirably, smoothing roll relative com pact to be thickly arranged on after slewing rollers slewing rollers relative com pact in other words and to be thickly arranged on before smoothing roll, even if thus in traditional adjustment free belt length F be also minimized.In this mode of operation, the operational adjustable range for looping angle or sinkage is relatively little.
Therefore the present invention proposes in the preferred expansion scheme of one, and smoothing roll can at sinkage During substantially along the circumferencial direction of slewing rollers or be tangential to slewing rollers and move.Guarantee at the free belt length of sinkage During minimally in this way, even if be also like this when being provided with relatively large distance between slewing rollers and smoothing roll.This large distance guarantees that sinkage or looping angle can change on a large scale.But free belt length is minimized all the time based on particularly preferred regulative mode, longitudinal ripple degree can be avoided thus.
This meaning such as by making smoothing roll regulate by straight line moves and realizes favouring the slewing rollers that the adjustment track that band direct of travel arranges moves and preferably arranges regularly relative to position point-blank.Adjustment on the adjustment track tilted regulates tool to have the following advantages relative to traditional " vertically ": smoothing roll roughly tangentially moves along the surface of slewing rollers at conditioning period, even if thus when sinkage changes relatively greatly, free belt length also still keeps less.
As an alternative solution, smoothing roll can move on arc, such as circular adjustment track by rotating the meaning regulated, and the adjustment track of this arc or circle surrounds the excircle of slewing rollers.In the case, described slewing rollers also can be arranged position regularly.Rotation on this arcuate movement track surrounding slewing rollers regulates and also makes, free belt length always only occurs little difference when different looping angles and free belt length remains under the limiting value of hope, then can occur longitudinal ripple degree between slewing rollers and smoothing roll when exceeding this limiting value.
Last in a kind of alternative, free belt length also can be minimized like this, is namely not only that smoothing roll moves relative to slewing rollers, but not only smoothing roll but also the slewing rollers that match move in a suitable manner.Such as smoothing roll can move perpendicular to band direct of travel and (simultaneously) slewing rollers move along band direct of travel in the horizontal direction in other words.The mobile smoothing roll that also makes of this combination moves on a kind of circular path or tangential track relative to slewing rollers.
In category of the present invention, between the smoothing roll that can set gradually at two all the time, relatively large distance is set, this distance be preferably (maximum) strip width at least 30%, be particularly preferably at least 50%.Maximum strip width refers to the strip width of maximum processed sheet metal strip in the stretch-bend leveller equipment of specific design.
, slewing rollers have larger diameter more obvious than smoothing roll in category of the present invention importantly, because slewing rollers only play elastic reaction substantially.Therefore desirably, the diameter of slewing rollers is at least 5 times, preferably at least 8 times of the diameter of the smoothing roll matched.Therefore the diameter of slewing rollers is approximately the diameter about 10 times of the smoothing roll matched also is suitable.
The diameter of smoothing roll is preferably 70mm to the maximum, is such as 50mm to the maximum.The diameter of one or more smoothing roll can be such as 15mm to 70mm, be preferably 25mm to 50mm.
The diameter of slewing rollers is preferably at least 150mm, is particularly preferably at least 250mm.Therefore diameter that is one or more or all slewing rollers can be such as 150mm to 700mm, be preferably 250mm to 600mm.
Band is generally 2 ° to 45 ° around the looping angle of one or more smoothing roll, is preferably 3 ° to 30 °.
Therefore particularly importantly one or more roller assembly in category of the present invention, it comprises slewing rollers and a smoothing roll matched respectively.Two this roller assemblys are preferably set, particularly preferably three roller assemblys are set.Be the preposition slewing rollers of each smoothing roll actual disposition one in principle in category of the present invention at this.But preferably specify, the roller assembly be made up of respectively be arranged in the first equipment section slewing rollers and smoothing roll, in this first equipment section, produce that the total plastic property of band extends at least 75%, preferably total plastic property extend at least 95%.Because the major part of usual degree of drawing produces and therefore produces in the first equipment section on front several smoothing roll in stretch-bend leveller, and at remaining, mainly on smoothing roll below eliminate remaining moment of flexure.Now according to the present invention's regulation, described roller assembly is preferably arranged on (above) first in equipment section, in this first equipment section, produce at least 75% of the plastic elongation of band, preferably plastic elongation at least 95%.Corresponding therewith, suitable in other words be sufficient that, in (below) second, one or more smoothing roll is only set in equipment section, in this second equipment section, mainly eliminate the residual bend after aligning in band or be reduced to desired value and usually only produce maximum 25%, preferably maximum 5% of plastic elongation, the slewing rollers matched can be omitted in this region.At this desirably, the first equipment section comprises roller assembly that two or three have described adjustment possibility, that be made up of smoothing roll and preposition slewing rollers respectively.The the second equipment section corrected for residual bend has at least two can the smoothing roll of adjusting position separately, can omit slewing rollers in this region.But in category of the present invention, also slewing rollers can be set in the region of the second equipment section.
As an alternative solution, multiple roll aligning group also can be set having after the described roller assembly of short free belt length.
In addition the invention still further relates to a kind of stretch-bend leveller equipment for carrying out stretch-bend leveller sheet metal strip with the method for the above-mentioned type.For this reason see claims and follow-up explanation.
Accompanying drawing explanation
The present invention is described in detail below by accompanying drawing illustrated embodiment.Accompanying drawing is as follows:
Fig. 1 is the first embodiment for implementing the stretch-bend leveller equipment according to the inventive method;
Fig. 2 is the second embodiment according to stretch-bend leveller equipment of the present invention;
Fig. 3 is the third embodiment of the present invention;
Fig. 4 is the 4th kind of embodiment of the present invention.
Detailed description of the invention
Accompanying drawing illustrates a kind of stretch-bend leveller equipment for stretch-bend leveller sheet metal strip 1 respectively.This stretch-bend leveller equipment has an import pinch roll group 2 and smoothing roll 5a, 6a, 7a, the 8a exporting pinch roll group 3 and be arranged between described pinch roll group 2,3 in its basic structure.The import pinch roll group 2 with pinch roll 4 can be designed to brake roller group, and the outlet pinch roll group 3 with pinch roll 4 can be designed to pulling force roller group.Band direct of travel D level or substantial horizontal extend.
Can produce tension in sheet metal strip 1 by pinch roll group 2,3, but this tension is less than the elastic limit of strip material.Therefore band is elongated by plastic elongation by alternating bending and at this moment in plastic range or elastic-plastic range around smoothing roll 5a to 8a.Can be supported by least two backing rolls in known manner in principle at this each smoothing roll 5a, 6a, 7a, 8a.Described backing roll is not shown in the drawing.
In order to make method implement adapt to various different condition, each smoothing roll 5a, 6a, 7a and 8a can be conditioned relative to band, can change thus smoothing roll 5a, 6a, 7a, 8a sinkage and therefore band around the looping angle of smoothing roll.In addition also can find out in the accompanying drawings, be several smoothing roll configuration slewing rollers 5b, 6b, 7b.
First illustrate the first embodiment of stretch-bend leveller equipment with simplified schematic see Fig. 1, Fig. 1 for this reason.First can see, the stretch-bend leveller equipment with multiple smoothing roll 5a-8a generally includes the first equipment section A1 and the second equipment section A2, arranges multiple smoothing roll 5a, 6a, mainly produce degree of drawing by these smoothing rolls in the first equipment section A1.Multiple smoothing roll 7a, 8a are set equally in the second equipment section A2, eliminate remaining moment of flexure by these smoothing rolls.Be that smoothing roll 5a and 6a configures slewing rollers 5b and 6b now in the first equipment section A1, wherein slewing rollers 5b, a 6b be set respectively before each smoothing roll 5a, 6a.Slewing rollers 5b, 6b have the diameter obviously larger than smoothing roll 5a, 6a at this, and therefore slewing rollers 5b, 6b only plays elastic reaction substantially.
In principle advantageously, also as shown in Figure 1 distance larger between smoothing roll, relatively large distance is set between each smoothing roll 5a, 6a, 7a, 8a, because can reduce or eliminate remaining percent ripple completely.But there will be such problem at this, namely band tends to produce flexible longitudinal ripple degree, i.e. so-called towel effect under this large distance.This problem especially appears in thin strip, and it is in high tension in larger distance.When by this way in the band of longitudinal ripple shape through smoothing roll, this longitudinal ripple degree is had a negative impact to leveling effect in plasticity press-in band.In category of the present invention, should avoid this longitudinal ripple degree now before smoothing roll.This effect mainly appears at also elongates remarkable plasticity on the smoothing roll of band.To smoothing roll later---the residual bend of substantially only carrying out local plastic by it corrects, and this flexible longitudinal ripple degree is unimportant or only produce minor effect.
Now as can be seen from Figure 1, before be provided with slewing rollers smoothing roll 5a, 6a can be conditioned towards band, can sinkage be changed thus.Regulated by the known rotation of prior art in principle, it is illustrated in smoothing roll 5a; And vertical adjusting, it is illustrated in smoothing roll 6a.As seen from Figure 1, at sinkage During, the free belt length F left a little 9 to the point of arrival 10 of band on smoothing roll left from slewing rollers at band changes.Now, when smoothing roll 5a or 6a relative com pact being thickly arranged on after slewing rollers 5b, 6b and distance A is therefore relatively little relative to band direct of travel D, then in the adjustment that this is traditional, free belt length F also can be made to minimize.Therefore, even if regulate smoothing roll 5a or 6a in a conventional manner according to Fig. 1, free belt length F also can be very little, thus avoid the formation of longitudinal ripple degree.
On the other hand, Fig. 2,3 and 4 illustrates that one preferred embodiment, and wherein, free belt length also can be changed in larger looping angle of regulation range.
In this case change sinkage, regulate smoothing roll 5a, 6a or 7a relative to the slewing rollers that match like this, make band leave from slewing rollers to leave free belt length F a little 9 to the point of arrival 10 of band on the smoothing roll matched little as far as possible and be no more than the maximum of regulation.For this reason, each smoothing roll or wherein several smoothing roll sinkage During can substantially along slewing rollers circumferencial direction or be tangential to slewing rollers and move.
This can structurally be implemented in a different manner.Fig. 2,3 and 4 illustrates three kinds of different possibilities.Leave a little 9, the point of arrival 10 and free belt length F be not explicitly shown in figures 2,3, and 4, but its definition provides in Fig. 1 and relevant explanation.
Fig. 2 illustrates for three kinds of each smoothing roll different adjustment possibilities.
A kind of possibility shown in the region of the first smoothing roll 5a of the equipment according to Fig. 2, namely smoothing roll 5a by rotate the meaning that regulates arc and in this embodiment for circular adjustment track 12 moves.Contrary with adjustment track known shown in Fig. 1, according in the present invention program of Fig. 2, regulate track 12 to surround the excircle of slewing rollers 5b, slewing rollers 5b can be arranged position in this embodiment regularly.By rotating this particular design regulated, smoothing roll 5a can move at sinkage During in large adjustment stroke, makes free belt length F remain minimum.
In the second smoothing roll 6a shown in Fig. 2, the meaning rectilinear movement that this smoothing roll 6a can regulate by straight line.But regulate contrary with the straight line of Fig. 1 shown in the second roller, according to smoothing roll 6a of the present invention not by vertical adjusting, but move on the adjustment track 11 favouring band direct of travel D extension point-blank.Slewing rollers 6b also can be arranged position regularly.Fig. 2 illustrates, achieve a substantially tangential adjustment track 11 in this way, therefore free belt length F also minimally changes in relatively large adjustment stroke.
By finding out that another kind makes free belt length F in sinkage During possibility minimally according to the 3rd smoothing roll 7a of Fig. 2.For this reason, not only smoothing roll 7a and also slewing rollers 7b also removable, move in different directions or rather.Smoothing roll 7a can move transverse to band direct of travel D by the meaning of vertical adjusting, and the slewing rollers 7b matched can by the meaning of Level tune along band direct of travel D with therefore move horizontally.Also free belt length F can be minimized by aggregate motion.
Now, free belt length can be remained under limiting value by possibilities different shown in Fig. 2, when exceeding this limiting value, longitudinal ripple degree can be produced between slewing rollers and smoothing roll.Therefore can avoid described towel effect, thus realize the flatness effect of optimization generally.Especially by changing the bending strength of each smoothing roll and change sinkage or the band looping angle around smoothing roll to realize this point for this reason.Therefore thickness, the width band different with limit of stretch can be aligned by stretch-bend leveller equipment according to the present invention.Fig. 2 should especially illustrate different adjustment possibilities, therefore show in fig. 2 for all smoothing roll 5a, 6a and 7a according to adjustment of the present invention.
But usually only need arrange a kind of according to the mode regulating smoothing roll relative to slewing rollers of the present invention in practice in the first equipment section A1.For this reason for example, see Fig. 3 and 4.
Fig. 3 illustrates a kind of stretch-bend leveller equipment with four smoothing rolls 5a, 6a, 7a and 8a.Be at least the first two smoothing roll 5a, 6a and configure slewing rollers 5b or 6b respectively, described slewing rollers are provided with according to adjustment of the present invention.Described tilt adjustment is being realized according in the embodiment of Fig. 3.On the other hand, be that two smoothing roll 7a and 8a in the second equipment section A2 arrange traditional vertical adjusting.Because as mentioned above, the longitudinal ripple degree problem before smoothing roll mainly appears at and also remarkable plasticity is elongated on the smoothing roll of band.To smoothing roll later---the residual bend of substantially only carrying out local plastic by it corrects, and this flexible longitudinal ripple degree only produces minor effect.Therefore need not use in the region of smoothing roll 7a, 8a according to slewing rollers of the present invention or according to the mode regulating smoothing roll relative to slewing rollers of the present invention.Therefore, residual bend corrects at least is undertaken by two smoothing roll 7a and 8a, and described smoothing roll is configured to can adjusting position separately.But in category of the present invention, also or slewing rollers can be set before described smoothing roll 7a, 8a below.
Fig. 4 illustrates a kind of alternative of the present invention, wherein, is that two smoothing roll 5a and 6a configure corresponding slewing rollers 5b and 6b, as totally arranging a multiple roll resistance straightening unit 15 after these two smoothing rolls.Residual bend correction can be carried out by this multiple roll resistance straightening unit.Multiple roll resistance straightening unit 15 can comprise the fixing lower roll in position and adjustable top roll.This only schematically shows in the diagram.
In addition, Fig. 3 and 4 illustrates such embodiment, wherein, only before the first two smoothing roll 5a, 6a, arranges corresponding slewing rollers 5b, 6b.But be suitable for equally before the 3rd smoothing roll 7a, arrange a corresponding slewing rollers 7b.This embodiment does not illustrate in figures 3 and 4.But must consider, in multiple smoothing roll set gradually, usually produce more and more lower degree of drawing from smoothing roll to smoothing roll, the problem of longitudinal ripple degree becomes more and more not serious towards the terminal of equipment thus.
Claims (26)
1. for the method for stretch-bend leveller sheet metal strip (1),
Utilize stretch-bend leveller equipment, this stretch-bend leveller equipment have multiple set gradually on band direct of travel (D) and the smoothing roll (5a, 6a, 7a, 8a) separated on band direct of travel (D);
Make to be in and be less than band (1) in the tension of elastic limit around smoothing roll (5a, 6a, 7a, 8a) alternating bending and make band be subject to plastic elongation at this moment;
Respectively arrange a slewing rollers (5b, 6b, 7b) above at one or more smoothing roll (5a, 6a, 7a) that can regulate relative to band (1), described slewing rollers have larger diameter than correspondingly rearmounted smoothing roll;
It is characterized in that, in order to change sinkage, described smoothing roll (5a, 6a, 7a) regulates relative to the slewing rollers matched (5b, 6b, 7b), makes the free belt length (F) leaving of leaving from slewing rollers of band (1) point (9) to arrive the smoothing roll the matched point of arrival (10) to band (1) on whole adjustable range, be no more than the maximum of 8% of strip width all the time.
2. method according to claim 1, it is characterized in that, in order to change sinkage, described smoothing roll (5a, 6a, 7a) regulates relative to slewing rollers (5b, 6b, 7b), makes free belt length (F) be no more than the maximum of 4% of strip width.
3. according to the method for claim 1 or 2, it is characterized in that, described free belt length (F) is no more than the maximum of 150mm.
4. method according to claim 3, is characterized in that, described free belt length (F) is no more than the maximum of 100mm.
5. according to the method for claim 1 or 2, it is characterized in that, in order to change sinkage, described smoothing roll (5a, 6a, 7a) perpendicular to or be approximately perpendicular to band direct of travel (D) and regulate, and smoothing roll (5a, 6a, 7a) is so little to the distance (A) of slewing rollers (5b, 6b, 7b), and namely free belt length (F) is less than maximum all the time or is no more than maximum in whole adjustable range.
6. according to the method for claim 1 or 2, it is characterized in that, described smoothing roll (5a, 6a, 7a) at sinkage During substantially along the circumferencial direction of slewing rollers (5b, 6b, 7b) or to be tangential to slewing rollers (5b, 6b, 7b) mobile.
7. method according to claim 6, is characterized in that, the meaning that described smoothing roll (5a, 6a, 7a) regulates by straight line is point-blank to favour the adjustment track (11) that band direct of travel (D) arranges upper mobile.
8. method according to claim 6, it is characterized in that, described smoothing roll (5a, 6a, 7a) is upper mobile at the adjustment track (12) of arc by rotating the meaning regulated, and this adjustment track surrounds the excircle of slewing rollers (5b, 6b, 7b).
9. method according to claim 6, is characterized in that, at sinkage During, not only smoothing roll (5a, 6a, 7a) but also the slewing rollers (5b, 6b, 7b) that match also move.
10. method according to claim 9, is characterized in that, described smoothing roll (5a, 6a, 7a) moves perpendicular to band direct of travel point-blank and slewing rollers (5b, 6b, 7b) move horizontally along band direct of travel point-blank.
11. according to the method for claim 1 or 2, and it is characterized in that, band is 2 ° to 45 ° around the looping angle of smoothing roll.
12. according to the method for claim 1 or 2, it is characterized in that, utilize one or more roller assembly be made up of a slewing rollers (5b, 6b, 7b) and a smoothing roll (5a, 6a, 7a) respectively, described roller assembly is arranged in the first equipment section (A1), produces 75% of at least total plastic property elongation in this first equipment section.
13. methods according to claim 12, it is characterized in that, after the roller assembly be made up of slewing rollers (5b, 6b, 7b) and smoothing roll (5a, 6a, 7a) respectively, one or more smoothing roll (7a, 8a) is set, described rearmounted smoothing roll (7a, 8a) is arranged in the second equipment section (A2), in this second equipment section in order to correct residual bend only produce total plastic property extend maximum 25%.
14. for the stretch-bend leveller equipment by the method stretch-bend leveller sheet metal strip according to one of claim 1 to 13,
It comprises multiple set gradually on band direct of travel (D) and the smoothing roll (5a, 6a, 7a, 8a) separated on band direct of travel (D);
Be in and be less than band (1) in the tension of elastic limit around smoothing roll (5a, 6a, 7a, 8a) by alternating bending and at this moment by plastic elongation;
Arrange a slewing rollers (5b, 6b, 7b) respectively above at one or more smoothing roll (5a, 6a, 7a) that can be conditioned relative to band (1), described slewing rollers have larger diameter than corresponding rearmounted smoothing roll;
It is characterized in that, in order to change sinkage, described smoothing roll (5a, 6a, 7a) can regulate relative to the slewing rollers matched (5b, 6b, 7b), makes band (1) on whole adjustable range, be no more than the maximum of 8% of maximum strip width when different sinkages or looping angle all the time from the free belt length (F) leaving of leaving of slewing rollers point (9) to arrive the smoothing roll the matched point of arrival (10) to band (1).
15. equipment according to claim 14, it is characterized in that, in order to change sinkage, described smoothing roll (5a, 6a, 7a) can regulate relative to slewing rollers (5b, 6b, 7b), makes free belt length (F) be no more than the maximum of 4% of maximum strip width all the time when different sinkages or looping angle.
16. according to the equipment of claims 14 or 15, and it is characterized in that, the distance of two smoothing rolls (5a to 8a) set gradually is at least 30% of maximum strip width.
17. according to the equipment of claims 14 or 15, and it is characterized in that, the diameter of described slewing rollers (5b, 6b, 7b) is at least 5 times of the diameter of the smoothing roll (5a, 6a, 7a) matched.
18. according to the equipment of claims 14 or 15, and it is characterized in that, the largest diameter of described smoothing roll (5a, 6a, 7a, 8a) is 70mm.
19. according to the equipment of claims 14 or 15, and it is characterized in that, the diameter of described slewing rollers (5b, 6b, 7b) is at least 150mm.
20. according to the equipment of claims 14 or 15, it is characterized in that, described smoothing roll (5a, 6a, 7a) can at sinkage During substantially along the circumferencial direction of slewing rollers (5b, 6b, 7b) or to be tangential to slewing rollers (5b, 6b, 7b) mobile.
21. equipment according to claim 20, is characterized in that, the meaning that described smoothing roll (5a, 6a, 7a) can regulate by straight line is point-blank to favour the adjustment track (11) that band direct of travel (D) arranges upper mobile.
22. equipment according to claim 20, it is characterized in that, described smoothing roll (5a, 6a, 7a) can be upper mobile at the adjustment track (12) of arc by rotating the meaning regulated, and this adjustment track surrounds the excircle of slewing rollers (5b, 6b, 7b).
23. equipment according to claim 20, it is characterized in that, at sinkage During, not only smoothing roll (5a, 6a, 7a) but also the slewing rollers (5b, 6b, 7b) that match can move, and smoothing roll moves perpendicular to band direct of travel point-blank and slewing rollers move horizontally along band direct of travel point-blank.
24. according to the equipment of claims 14 or 15, it is characterized in that, it comprises one or more respectively by a slewing rollers (5b, 6b, 7b) He one smoothing roll (5a, 6a, roller assembly 7a) formed, described roller assembly is arranged in the first equipment section (A1), 75% of at least total plastic property elongation is produced in this first equipment section, and after the roller assembly be made up of slewing rollers and smoothing roll respectively, one or more smoothing roll (7a is set, 8a), described rearmounted smoothing roll (7a, 8a) be arranged in the second equipment section (A2), for correction residual bend only produces maximum 25% of total plastic property elongation in this second equipment section.
25. equipment according to claim 24, is characterized in that, have at least two smoothing rolls (7a, 8a) for the described second equipment section (A2) correcting residual bend.
26. equipment according to claim 24, is characterized in that, have a multiple roll aligning group (15) for the described second equipment section (A2) correcting residual bend.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102010024714.6A DE102010024714C5 (en) | 2010-06-23 | 2010-06-23 | Method for stretch bending of metal strips and stretch bending plant |
| DE102010024714.6 | 2010-06-23 | ||
| PCT/EP2011/060394 WO2011161134A1 (en) | 2010-06-23 | 2011-06-22 | Stretch-bending straightener |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102971096A CN102971096A (en) | 2013-03-13 |
| CN102971096B true CN102971096B (en) | 2015-02-04 |
Family
ID=44627820
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201180030624.2A Expired - Fee Related CN102971096B (en) | 2010-06-23 | 2011-06-22 | Stretch-bending straightener |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US9174257B2 (en) |
| EP (1) | EP2585236B1 (en) |
| KR (1) | KR101851028B1 (en) |
| CN (1) | CN102971096B (en) |
| DE (1) | DE102010024714C5 (en) |
| RU (1) | RU2528528C2 (en) |
| WO (1) | WO2011161134A1 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102012020444B4 (en) * | 2012-10-18 | 2015-01-22 | Vdeh-Betriebsforschungsinstitut Gmbh | Method for determining the tensile strength of a strip in a straightening machine and tensile softness sensor |
| DE102013106243C5 (en) * | 2013-06-14 | 2018-10-04 | Bwg Bergwerk- Und Walzwerk-Maschinenbau Gmbh | Method and device for stretch bending of metal strips |
| US11076664B1 (en) | 2014-09-22 | 2021-08-03 | Apple Inc. | Fabric cases for electronic devices |
| CN105290159B (en) * | 2015-12-04 | 2018-07-24 | 中冶南方工程技术有限公司 | Chill belt plate shape straightening process |
| CN105290110B (en) * | 2015-12-04 | 2018-03-13 | 中冶南方工程技术有限公司 | Chill strip compound straightening machine |
| DE102016106208A1 (en) * | 2016-04-05 | 2017-10-05 | Bwg Bergwerk- Und Walzwerk-Maschinenbau Gmbh | Method for stretch bending of a strip |
| DE102016121448B4 (en) * | 2016-11-09 | 2018-08-30 | Bwg Bergwerk- Und Walzwerk-Maschinenbau Gmbh | Method and device for stretch bending of a metal strip |
| CN112496088B (en) * | 2020-11-18 | 2022-04-12 | 山东钢铁集团日照有限公司 | Control method for improving C-warped plate shape of galvanized plate through zero-elongation withdrawal and straightening |
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2011
- 2011-06-22 US US13/697,508 patent/US9174257B2/en active Active
- 2011-06-22 KR KR1020137001796A patent/KR101851028B1/en active IP Right Grant
- 2011-06-22 RU RU2013102863/02A patent/RU2528528C2/en active
- 2011-06-22 CN CN201180030624.2A patent/CN102971096B/en not_active Expired - Fee Related
- 2011-06-22 EP EP11729095.7A patent/EP2585236B1/en active Active
- 2011-06-22 WO PCT/EP2011/060394 patent/WO2011161134A1/en active Application Filing
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| US3605470A (en) * | 1969-01-27 | 1971-09-20 | Natalis H Polakowski | Pressure assisted tension roller leveler |
| US3841132A (en) * | 1971-09-14 | 1974-10-15 | Lysaght Ltd John | Method of flattening metal strip exhibiting a discontinuous yield point and suppressing the discontinuous yield point |
| US3839888A (en) * | 1972-11-06 | 1974-10-08 | Wean United Inc | Tension levelling of strip |
| CN1174101A (en) * | 1996-08-15 | 1998-02-25 | 川崎制铁株式会社 | Bending adjuster of skin-pass machine |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN102971096A (en) | 2013-03-13 |
| RU2528528C2 (en) | 2014-09-20 |
| KR101851028B1 (en) | 2018-04-20 |
| WO2011161134A1 (en) | 2011-12-29 |
| DE102010024714A1 (en) | 2011-12-29 |
| US9174257B2 (en) | 2015-11-03 |
| EP2585236A1 (en) | 2013-05-01 |
| US20130111962A1 (en) | 2013-05-09 |
| DE102010024714C5 (en) | 2018-10-18 |
| DE102010024714B4 (en) | 2014-09-25 |
| EP2585236B1 (en) | 2022-07-20 |
| KR20130041132A (en) | 2013-04-24 |
| RU2013102863A (en) | 2014-07-27 |
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Effective date of registration: 20200724 Address after: Freire angatine, France Patentee after: Redix Co., Ltd Address before: Duisburg Patentee before: BWG BERGWERK- UND WALZWERK-MASCHINENBAU GmbH |
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